summaryrefslogtreecommitdiffstats
path: root/kernel/sched
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/core.c4
-rw-r--r--kernel/sched/fair.c9
-rw-r--r--kernel/sched/sched.h18
3 files changed, 22 insertions, 9 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 0c3feebcf112..a972acd468b0 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1049,6 +1049,8 @@ static int migrate_swap_stop(void *data)
src_rq = cpu_rq(arg->src_cpu);
dst_rq = cpu_rq(arg->dst_cpu);
+ double_raw_lock(&arg->src_task->pi_lock,
+ &arg->dst_task->pi_lock);
double_rq_lock(src_rq, dst_rq);
if (task_cpu(arg->dst_task) != arg->dst_cpu)
goto unlock;
@@ -1069,6 +1071,8 @@ static int migrate_swap_stop(void *data)
unlock:
double_rq_unlock(src_rq, dst_rq);
+ raw_spin_unlock(&arg->dst_task->pi_lock);
+ raw_spin_unlock(&arg->src_task->pi_lock);
return ret;
}
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4aa0b10889d0..813dd61a9b43 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1448,15 +1448,6 @@ static inline void put_numa_group(struct numa_group *grp)
kfree_rcu(grp, rcu);
}
-static void double_lock(spinlock_t *l1, spinlock_t *l2)
-{
- if (l1 > l2)
- swap(l1, l2);
-
- spin_lock(l1);
- spin_lock_nested(l2, SINGLE_DEPTH_NESTING);
-}
-
static void task_numa_group(struct task_struct *p, int cpupid, int flags,
int *priv)
{
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index d69cb325c27e..ffc708717b70 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1249,6 +1249,24 @@ static inline void double_unlock_balance(struct rq *this_rq, struct rq *busiest)
lock_set_subclass(&this_rq->lock.dep_map, 0, _RET_IP_);
}
+static inline void double_lock(spinlock_t *l1, spinlock_t *l2)
+{
+ if (l1 > l2)
+ swap(l1, l2);
+
+ spin_lock(l1);
+ spin_lock_nested(l2, SINGLE_DEPTH_NESTING);
+}
+
+static inline void double_raw_lock(raw_spinlock_t *l1, raw_spinlock_t *l2)
+{
+ if (l1 > l2)
+ swap(l1, l2);
+
+ raw_spin_lock(l1);
+ raw_spin_lock_nested(l2, SINGLE_DEPTH_NESTING);
+}
+
/*
* double_rq_lock - safely lock two runqueues
*